Stress-bearing Mechanism of Concrete Damaged by Delayed Ettringite Formation under Compressive Stress with Various Loading Patterns

The involvement of expansion cracks in reducing compressive properties was experimentally evaluated. Concrete specimens deteriorated by delayed ettringite formation were subjected to three loading patterns (monotonic, stepwise cyclic and sustained loadings) and digital image correlation was performe...

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Bibliographic Details
Published inJournal of advanced concrete technology Vol. 21; no. 4; pp. 294 - 306
Main Authors Fujishima, Misato, Miura, Taito, Kawabata, Yuichiro
Format Journal Article
LanguageEnglish
Published Tokyo Japan Science and Technology Agency 19.04.2023
Subjects
Compressive properties
Digital imaging
Ettringite
Plastic deformation
Reduction
Strain
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Summary:The involvement of expansion cracks in reducing compressive properties was experimentally evaluated. Concrete specimens deteriorated by delayed ettringite formation were subjected to three loading patterns (monotonic, stepwise cyclic and sustained loadings) and digital image correlation was performed to observe the behavior of expansion cracks during compressive loading. As a result, while significantly large plastic deformation was generated in the pre-peak, the reduction in compressive properties was hardly influenced by the loading patterns. The elastic strain, obtained from the loading hysteresis, increased linearly until a maximum load was reached. Consequently, two possible stress-bearing mechanism of concrete damaged by delayed ettringite formation under compressive stress was proposed to explain the development of elastic and plastic strains and the reduction in the compressive property.
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ISSN:1346-8014
1347-3913
DOI:10.3151/jact.21.294